The stere­o­scope is rel­a­tive­ly large and fea­tures a focus­ing knob on the under­side. After loos­en­ing the knob, focus is adjust­ed by slid­ing the stere­oview hold­er. The lens pan­el is posi­tioned deep with­in the device, while the wood­en hous­ing reduces inci­dent light. Large side shields fur­ther …

The box-type stere­o­scopes pro­duced by Erne­mann are char­ac­terised in par­tic­u­lar by their dis­tinc­tive bur­­gundy-coloured hous­ing. The view­er was avail­able in a wide range of for­mats: 45 x 107, 6 x 13, 8.5 x 17, 9 x 12, 9 x 14, 9 x 18, 10 x 15 …

The name sug­gests that it is a French stere­o­scope, but the Mignon-Stéréo is of Ger­man man­u­fac­ture. The device is intend­ed for small 3 x 6.5 cm glass stere­oviews that were made specif­i­cal­ly for this view­er. The Mignon-Stéréo was mar­ket­ed as The small­est stereo­scop­i­cal appa­ra­tus of …

The name sug­gests that it is a French stere­o­scope, but the Mignon-Stéréo is of Ger­man man­u­fac­ture. The device is intend­ed for small 3 x 6.5 cm glass stere­oviews that were made specif­i­cal­ly for this view­er. The Mignon-Stéréo was mar­ket­ed as The small­est stereo­scop­i­cal appa­ra­tus of …